Valve-reversing gear.



0.A.D01 1ATH, VALVE REVBRSING GEAR. APPLICATION IILED AUG. 30, 1910.

Patented May 9, 1911.

2 BHEIITS-BHEET Z.

Attorneys.

OTTO A. DONATH, OF SEDALIA, MISSOURI.

VALVE-REVERSING GEAR.

Specification of Letters Patent.

Patented May 9, 1911.

Application filed. August 30, 1910. Serial No. 579,670.

To all whom it may concern:

Be it known that I, Or'ro A. DONATH, a citizen of the United States,residing at Sedalia, in the county of Pettis and State of Missouri, haveinvented a new and useful Valve-Reversing Gear, of which the followingis a specification.

This invention relates to valve reversing gear for locomotives.

One object of the present invention is, in a ready and practical manner,to dispense with eccentrics and links in setting the valve, thus toobviate an objection present in many forms of reversing gears now inuse, whereby danger of derangement and wear are reduced to a minimum,and the cost of production proportionally lessened.

A further object is to adapt the invention to existing engines withoutnecessitating any material change in its frame structure and none in itsvalves.

A. final object is to provide a novel reversing gear that shall besimple of construo-- tion, efficient and durable in use, and easy ofapplication.

lVith the above and other objects in view, as will appear as the natureof the invention is better understood, the same consists in the novelconstruction and combination of parts of a reversing gear forlocomotives, as will be hereinafter so described and claimed.

In the accompanying drawings forming a part of this specification, andin which like characters of reference indicate corresponding parts:Figure 1 is a view in the nature of a diagram showing the application ofthe reversing gear to that portion of a locomotive with which it coacts.Fig. 2 is a similar view showing the position of the reversing gear whenset to allow the valve no travel exceptthe distance of its lap. Fig. 3is a view similar to Fig. 2 showing the position of the reversing gearwhen set to allow full throw of the valve. Fig. 4 is a view in endelevation of the device, with parts broken away. Fig. 5 is a view inside elevation. Fig. 6 is a vertical sectional view, taken on the line66 Fig. 4. Fig. 7 is a horizontal sectional view taken on the line 77Fig. 4. Fig. 8 is a transverse sectional view taken on the line 88 Fig.5. Fig. 9 is a detail view of a portion of the device.

The apparatus embodies a two-part cylinder comprising sections 1 and 2,each being provided with two pairs of orificed ears 3 held rigidlyassembled by bolts 4. The ends of the cylinder are closed by heads 5 and6 that in this instance form integral parts of a spindle 7 which isprovided with an allthrough slot 8 that extends from end to end.Slidably mounted on the spindle and loosely fitting within the cylinderis a collar composed of two sections 9 and 10 connected by screws 11.The collar is provided with a circumferential groove 12 in which fits aring, composed of two semi-circular sections 13 and 14, the terminals ofeach of which carry outstanding pins 15 which, as shown in Fig. 5, aresemi-circular in cross section with their fiat faces juxtaposed, therebycausing the compound pins produced to be circular in cross section. Thepins project outward beyond the walls of the cylinder through slots 16formed in the meeting edges of the cylinder section, and engage crotches17 formed in the ends of a pair of arms 18 secured by a pin 19 to a rod20 that is journaled in a lug or boss 21 which constitutes the lower endof the cylinder section 2. Pivoted within the slot- 8 of the spindle andupon a pin 22 extending therethrough is a bell crank lever 23, theshorter arm 24 of which is provided in its end with a crotch 25 that isdesigned to straddle a pin 26 carried by the collar. The longer arm 27of the lever is provided in its end with a crotch 28 that is designed tostraddle a round faced lug 29 depending from a plate 30 mounted to slidein a guide Way 31 formed in the cylinder head 5, and being held foroperative movement therein by a disk 32 secured to the head by screws33. Projecting upward from the slide plate and working in a slot 84 inthe disk is a pin 35, which, as

will appear later on, is connected by intermediate mechanism with theslide valves of the engine.

The head 2 of the cylinder carries an arm 36 designed to engage thecrank pin 37 of the locomotive driver and rotates therewith. "while thecylinder is held stationary by the rod 20 to which a lever 38 is rigidlysecured that is connected wit-h the reversing lever and operated fromthe engine cab in the usual manner.

By reference to Fig. 1 it will be seen that the pin 35 of the slideplate connects by a rod 39 with one end of a link 40, and the other endof the latter through a rod 41 with the cross head 42 of the valve rod43. In this figure the cylinder 44, oiston 45, con

necting IOd LG and slide valve 47 may be or" the usual or any preferredconstruction, and are merely shown to render clear an understanding ofthe invention.

In operation, let it be assumed that the pin 35 is in the position shownin Fig. 2, under which conditions the slide valve merely floats and hasa travel only equal to its lap. When it is desired to start the engine,the lever 38 is shifted from the cab to bring the pin say to theposition shown in Fig. 3. This motion is transmitted to the rod 20 andas the lever turns, the arms 18 shift the two part ring thereby causingthe collar to slide on the spindle. This latter motion through themedium of the pin 26 rocks the bell crank lever which in turn adjuststhe slide plate to the position desired, and the motion of the plate istransmitted to the slide valve by the connections 39, 4:0, 4:1 and 43and sets the valve.

It will be seen from the foregoing description that accurate andpositive setting and operation of the slide valve is secured without theemployment of links and levers for the purpose, and further that byreason of the arrangement of the parts, derangement in use will be onlya remote contingency.

What is claimed is: Y

1. A device of the class described embodying a member to be attached toand rotate with 1 the driver of a locomotive, a second member stationaryrelative to the first, a slidable element arranged to be connected withthe slide valve of an engine, and means for shifting the slidableelement to control the operation of the valve.

' actuating the collar, a sliding member actuated by the movement of thecollar, and

means for transmitting the movements of the sliding member to the slidevalve of an engine.

3. A device of the character described comprising a cylinder, a spindletherein, cylinder heads secured to the spindle, one of which embodies amember to be connected with the crank shaft of an engine and the other asliding member, a collar movable on the spindle, a bell crank leverarranged within the spindle and designed to operate the sliding member,means carried. by the collar to rock the bell crank lever, means forimparting sliding motions to the collar, and means for imparting suchmotions to the slide valve of an engine.

4:. A device of the character described comprising a cylinder, a slottedspindle arranged therein, cylinder heads secured to the spindle, acollar slidable on the spindle, a ring movable with the collar andhaving pins projecting at each side beyond the cylinder, a rod carriedby the cylinder, arms carried by the rod and having terminal crotches tostraddle the pin, a bell crank lever pivoted within the slot of thespindle, a sliding member combined with one of the cylinder heads andhaving a depending lug and an outstanding pin, the lug being arranged toengage a crotch in one of the arms of the lever, a pin carried by thecollar and engaging a crotch in the other arm of the lever, means foractuating the collar to shift the sliding member, and means forimparting motion from the sliding member to the slide valve of anengine.

In testimony that I claim the foregoing as my own, I have hereto affixedmy signature in the presence of two witnesses.

OTTO A. DONATH.

WVitnesses G120. A. DONATH, GEORGE L. SMITH.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D. G.

